The invention discloses an intramedullary nail which is an intramedullary support used for treating and fixing long tubal
bone fracture. The intramedullary nail comprises a nail rod, wherein two ends of the nail rod are provided with transverse positioning holes, one end of the nail rod is provided with an axial
tail cap bolt hole matched with a
tail cap, and in the length direction, the nail rod is provided with elongated slots which are radially symmetrical; the elongated slots of the nail rod are internally provided with stripy holes penetrating through the nail rod in the radial direction; the stripy holes are uniformly arranged at intervals along the length direction of the nail rod; the side walls of the stripy holes are provided with threads matched with transverse nails for locking
fractured bone blocks; the stripy holes are distributed in at least two rows on the circumference; the width of the elongated slot is 0.6-1 times the
radius of the nail rod, and the depth of the elongated slot is 0.4-0.6 times the
radius of the nail rod. The intramedullary nail disclosed by the invention adopts a
titanium alloy material, the cross section of the nail rod is of a dual H shape, so that a reinforcement effect is achieved, not only can favorable support and fixation effects be achieved, the transverse micromotion, excess stretching and revolution of a
bone fracture end can be prevented, but also any
fractured bone block of comminuted fracture can be fixed.